Alternators & Regulators MITSUBISHI Regulators: Testing

CAUTION: Ensure that voltage regulator protecting fuse is functional before conducting any charging system diagnosis. Verify condition by substituting known good fuse.

To check adjusted value of constant voltage relay, connect a voltmeter between terminal "A" and "E" of the regulator. Place alternator at no load by disconnecting positive terminal of battery while engine is idling. Increase alternator speed to approximately 4000 RPM (approximately 2000 engine RPM). Satisfactory voltage is 14-15 volts.